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glut_modifier.c

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00001 
00002 /* Copyright (c) Mark J. Kilgard, 1994. */
00003 
00004 /* This program is freely distributable without licensing fees 
00005    and is provided without guarantee or warrantee expressed or 
00006    implied. This program is -not- in the public domain. */
00007 
00008 #include <X11/Xlib.h>
00009 
00010 #include "glutint.h"
00011 
00012 int
00013 glutGetModifiers(void)
00014 {
00015   int modifiers;
00016 
00017   if(__glutModifierMask == (unsigned int) ~0) {
00018     __glutWarning(
00019       "glutCurrentModifiers: do not call outside core input callback.");
00020     return 0;
00021   }
00022   modifiers = 0;
00023   if(__glutModifierMask & (ShiftMask|LockMask))
00024     modifiers |= GLUT_ACTIVE_SHIFT;
00025   if(__glutModifierMask & ControlMask)
00026     modifiers |= GLUT_ACTIVE_CTRL;
00027   if(__glutModifierMask & Mod1Mask)
00028     modifiers |= GLUT_ACTIVE_ALT;
00029   return modifiers;
00030 }
00031
 
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